/* === S T A R T =========================================================== */

#ifndef __SYNFIG_TEMPLATE_H
#define __SYNFIG_TEMPLATE_H

/* === H E A D E R S ======================================================= */
#include <gtkmm/adjustment.h>

/* === M A C R O S ========================================================= */

/* === T Y P E D E F S ===================================================== */

/* === C L A S S E S & S T R U C T S ======================================= */

namespace studio {

/* Sets up an adjustment that controls/communicates with another adjustment
	(could be expanded to multiple children)

	The current value and pagesize define the lower and upper bounds of the
	child adjustment.

	NEED TO REPLACE FUNCTIONALITY IN:
	refresh_rend_desc
	refresh_time_window
	on_time_changed - possibly....

	time_zoom_in - possibly...
	time_zoom_out - possibly...

	play - possibly...

	THINGS TO CHECK:
	disp_audio's use of time_adjustment
	children_tree's use of time_adjustment
	layer_tree's use of time_adjustment
*/
class Adjust_Window : public Gtk::Adjustment
{
	Gtk::Adjustment	*adj_child;

	sigc::connection childchanged; //we only care about the non-value parts of the child

	virtual void on_changed(); //value+pagesize corresponds to child upper
	virtual void on_value_changed(); //value corresponds to child lower

protected: //update interface
	virtual void update_child();
	virtual void update_fromchild();

public: //structors
	Adjust_Window(double value, double lower, double upper,
					double step_increment=1, double page_increment=10, double page_size=0,
					Gtk::Adjustment *adj = 0);

	virtual ~Adjust_Window();

public: //child interface
	Gtk::Adjustment *get_child_adjustment();
	const Gtk::Adjustment *get_child_adjustment() const;
	void set_child_adjustment(Gtk::Adjustment *child);

public: //Sub value interface
	double get_sub_lower() const;
	double get_sub_upper() const;
};

}; // END of namespace studio

/* === E N D =============================================================== */

#endif
